Bungie's mobilizing the Halo community to join the Haiti recovery effort. On Wednesday, the studio encourages players to wear a special emblem supporting Haiti relief and pledges to donate up to $77,000 depending on how many participate.

For every 1,000 players who don the emblem on Wednesday or Thursday next week, in either Halo 3 or Halo 3:ODST, Bungie will donate $100 to the Red Cross' relief efforts for Haiti. Essentially, they're betting they can get 770,000 players to make the gesture in a two day span. I'd say that's likely.